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Conference Paper

Efficient Creation and Incremental Maintenance of the HOPI Index for Complex XML Document Collections

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Schenkel,  Ralf
Databases and Information Systems, MPI for Informatics, Max Planck Society;

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Theobald,  Anja
Databases and Information Systems, MPI for Informatics, Max Planck Society;

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Weikum,  Gerhard
Databases and Information Systems, MPI for Informatics, Max Planck Society;

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Citation

Schenkel, R., Theobald, A., & Weikum, G. (2005). Efficient Creation and Incremental Maintenance of the HOPI Index for Complex XML Document Collections. In Proceedings of the 21st International Conference on Data Engineering, ICDE 2005 (pp. 360-371). Los Alamitos, USA: IEEE.


Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-265E-C
Abstract
The HOPI index, a connection index for XML documents based on the concept of a 2--hop cover, provides space-- and time--efficient reachability tests along the ancestor, descendant, and link axes to support path expressions with wildcards in XML search engines. This paper presents enhanced algorithms for building HOPI, shows how to augment the index with distance information, and discusses incremental index maintenance. Our experiments show substantial improvements over the existing divide-and-conquer algorithm for index creation, low space overhead for including distance information in the index, and efficient updates.